ack/mach/m68k2/libem/cms.s

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.define .cms
.sect .text
.sect .rom
.sect .data
.sect .bss
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! d0 contains set size
.sect .text
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.cms:
move.l (sp)+,d2 ! return address
move.l sp,a0
move.l sp,a1
add d0,a1
move.w d0,d1
asr #1,d0
1:
cmp (a0)+,(a1)+
bne 2f
sub #1,d0
bgt 1b
2:
asl #1,d1
add d1,sp
move.w d0,-(sp)
move.l d2,-(sp)
rts